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Non-contrast high-resolution 4D-peripheral MRA using Retrospective EPI

Yasuhiro Goto¹, Michinobu Nagao¹, Masami Yoneyama², Yasutomo Katsumata², Isao Shiina¹, Kazuo Kodaira¹, Yutaka Hamatani¹, Takumi Ogawa¹, Mamoru Takeyama¹, Isao Tanaka¹, and Shuji Sakai¹
¹Women's Medical University Hospital, tokyo, Japan, ²Philips Japan, tokyo, Japan

We investigated whether non-contrast, high resolution PPU-triggered 4D-peripheral MRA using Retrospective EPI (REPI). REPI 4D-peripheral MRA with VENC of 10 cm/s showed higher vascular conspicuity compared with the conventional methods.

Figure 5. Representative REPI 4D MRA of the foot (left) and the hand (right). REPI 4D MRA could visualize blood vessels from proximal to distal with high robustness. The optimal VENC for visualizing peripheral blood vessels was 10cm/s.

Figure 4. Peripheral vessels of the foot. REPI VENC=10cm/s, TFE VENC=10cm/s, 3D-PCA VENC=10cm/s, 2D-TOF used for comparison. REPI 4D-MRA significantly improves vascular structure in AREA2,3,4, compared with the other three methods. Visualized.